--- title: "S-Energy SL65-72BGJ-545S 545W Solar Panel - Specs & Review | ComparePV" description: "S-Energy SL65-72BGJ-545S 545W solar panel. Specs: 21.10% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/s-energy-sl65-72bgj-545s" updated: 2026-09-11 --- # S-Energy SL65-72BGJ-545S Space saver, short guarantee 706 panels in the segment PERC 500-550 W ## Identity - **Manufacturer:** S-Energy - **Model:** SL65-72BGJ-545S - **Series:** SL65-72BGJ - **Rated power:** 545 W - **Cell technology:** PERC - **Bifacial:** yes ## How it compares Compared against segment PERC 500-550 W (706 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 545 W | 535 W | Strong - top 12% | | | Module efficiency | 21.10% | 20.90% | Strong - top 20% | 9,297 | | Power density | 211.0 | 209.0 | Strong - top 18% | 9,312 | | Temperature coefficient | -0.350 | -0.350 | Typical | 10,419 | | Weight (kg) | 28.5 kg | 28.4 kg | Typical | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 23% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.10% | 20.90% | Strong - top 20% | 9,297 | | Power density | 211.0 | 209.0 | Strong - top 18% | 9,312 | | Temperature coefficient | -0.350 | -0.350 | Typical | 10,419 | | Weight per kWp | 52.3 | 53.0 | Typical | 5,761 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 23% | 9,798 | ### Strengths - **211.0 watts per square metre** - Top 18% of the PERC 500-550 W segment, against a median of 209.0. - **21.10% module efficiency** - Top 20% of the PERC 500-550 W segment, against a median of 20.90%. ### Watch out for - **25 year performance warranty** - Bottom 23% of the PERC 500-550 W segment, against a median of 30 yrs. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 545 W - **Efficiency:** 21.10 % - **Voltage at Pmax (Vmp):** 41.60 V - **Current at Pmax (Imp):** 13.11 A - **Open-circuit voltage (Voc):** 49.80 V - **Short-circuit current (Isc):** 13.88 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.350 %/degC - **Temperature coefficient of Voc:** -0.270 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 144 - **Bifacial:** yes - **Bifacial gain:** 5.00 ### Physical - **Length:** 2278 mm - **Width:** 1134 mm - **Thickness:** 35 mm - **Weight:** 28.5 kg - **Area:** 2.58 m2 - **Power density:** 211.0 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 85.0 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.54 % - **Output after 30 years:** 449 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 9297 of 14005 | | Power density | 9312 of 14005 | | Temperature coefficient | 10419 of 14005 | | Weight | 5761 of 14005 | | Warranty | 9798 of 14005 | ## About this series The S-Energy SL65-72BGJ series is designed for installations where high energy production is crucial, even under less-than-ideal conditions. The use of a **bifacial construction** allows for better utilization of light reflected from the ground, which effectively supports energy generation on flat roofs, ground-mounted structures, and PV farms. The **monocrystalline** modules with half-cut cell technology minimize losses at connections and improve performance in partially shaded conditions, such as those caused by chimneys, trees, or railings. Compared to many competing panels, the SL65-72BGJ stands out due to its **rigid glass-glass construction**, which better withstands mechanical loads and material aging over the long term. An additional advantage is **low temperature dependence on power output**, which ensures stable performance during the summer months. This makes it a sensible choice for investors seeking durability, predictable energy yields, and modules for both prosumer and commercial projects. ## Notable figures - Efficiency of 21.1% matches the \*\*PERC 500-550W\*\* median - At 211.0 W/m² power density, roof space requirements are typical for \*\*PERC 500-550W\*\* panels - At -0.35%/°C, hot weather performance is typical for \*\*PERC 500-550W\*\* panels - In the top 66% for efficiency among all PERC panels ## Questions ### Are S-Energy SL65-72BGJ panels suitable for ground-mounted systems and utility-scale PV farms? Yes, the SL65-72BGJ series is well-suited for ground-mounted systems and solar farms. The bifacial construction captures light reflected from the ground surface, which under optimal conditions — bright albedo surface and correct tilt angle — can boost real-world yield by several percentage points compared to a monofacial module. With a peak power of up to 550 Wp, the series also allows higher installed capacity on the same footprint. ### What warranty does the S-Energy SL65-72BGJ solar panel come with? S-Energy provides a 12-year product warranty covering material and workmanship defects, plus a 25-year linear power warranty guaranteeing at least 80.7% of nominal output after 25 years. It is worth noting that S-Energy is not currently listed on the BNEF Tier-1 index, which is a relevant factor when assessing the manufacturer's ability to honor a long-term power warranty over a 25-year period. ### What does bifacial mean on the SL65-72BGJ, and is it worth it on a standard pitched roof? Bifacial means the panel generates electricity from both the front and rear sides. On a pitched roof where the back of the module sits close to the roof surface, rear-side gain is minimal — typically below 5%. The bifacial benefit is most significant on flat roofs with a light-colored membrane, ground-mounted systems with high-albedo ground cover, or elevated tracker installations. On a conventional pitched roof, the primary advantage of this model is the durability of the glass-glass construction rather than the bifacial effect itself. ### How do the half-cut PERC cells in the SL65-72BGJ help with partial shading from chimneys or trees? Half-cut cells reduce internal resistance and electrically isolate shaded cell segments from the rest of the module. In practice, shading from a chimney, railing, or tree branches causes a smaller power drop across the entire panel compared to full-size cells. PERC technology further improves minority carrier collection efficiency. Together, these features deliver better performance under partial shading conditions typical of urban and residential rooftop installations. ### Does the glass-glass design of the S-Energy SL65-72BGJ translate to a longer service life? Yes. Replacing the rear backsheet with tempered glass significantly increases the module's mechanical resistance to snow loads, wind, and hail, while also limiting moisture ingress and laminate degradation. The result is slower power degradation and a more predictable output curve over the full 25-year warranty period. The panel weighs approximately 31.5 kg — heavier than a backsheet equivalent — so mounting structures must be engineered accordingly. ### Is S-Energy a reputable manufacturer and is its 25-year power warranty reliable? S-Energy is a South Korean manufacturer headquartered in Seongnam, Gyeonggi-do, operating since 2001 with roots in Samsung's PV division. The company runs its own factory in South Korea with an annual production capacity of approximately 500 MW. It is not currently listed on the BNEF Tier-1 index, so buyers should apply additional due diligence when evaluating the long-term enforceability of its 25-year power warranty. For mid-scale residential and commercial projects it represents a competitive price-to-quality option. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/sl65-72bgj-xxxs-230809-010a717e3e0b.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, lighter, +3.9 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +3.7 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, +3.7 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, lighter, +3.6 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, +3.5 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, lighter, +3.4 pp | | [S-Energy SL65-72BDJ-525Z](https://comparepv.com/panel/s-energy-sl65-72bdj-525z) | 525 W | Heavier, -0.8 pp, +5 yr warranty | | [S-Energy SL65-72BDJ-530R](https://comparepv.com/panel/s-energy-sl65-72bdj-530r) | 530 W | Heavier, -0.6 pp, +5 yr warranty | | [S-Energy SL65-72BDJ-530Z](https://comparepv.com/panel/s-energy-sl65-72bdj-530z) | 530 W | Heavier, -0.6 pp, +5 yr warranty | | [S-Energy SE65-72BGJ-535S](https://comparepv.com/panel/s-energy-se65-72bgj-535s) | 535 W | -10 W, -0.4 pp | | [S-Energy SL65-72BDJ-535R](https://comparepv.com/panel/s-energy-sl65-72bdj-535r) | 535 W | Heavier, -0.4 pp, +5 yr warranty | | [S-Energy SL65-72BDJ-540R](https://comparepv.com/panel/s-energy-sl65-72bdj-540r) | 540 W | Heavier, +5 yr warranty | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +105 W, cooler, +4.1 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +100 W, cooler, +3.9 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +95 W, cooler, +3.7 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +90 W, cooler, +3.5 pp | --- Source: https://comparepv.com/panel/s-energy-sl65-72bgj-545s Not in this file, on the page: a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.